The executable was generated like so:
$ cat t.c
int main() { return 0; }
$ clang --target=i686-windows -c t.c -o t.o
$ lld-link t.o -out:t.exe -entry:main -debug

It has a mingw-style symbol table in the executable, which MSVC-produced images
don't have.

RUN: llvm-nm %p/Inputs/main-ret-zero-pe-i386.exe \
RUN:         | FileCheck %s -check-prefix PE-EXE

PE-EXE: 00401000 t .bss
PE-EXE: 00401000 t .data
PE-EXE: 00401000 t .text
PE-EXE: 00401000 T _main

The DLL was generated like so:
$ cat t.c
int DllMain(void *mod, long reason, void *reserved) { return 1; }
$ clang --target=i686-windows -c t.c -o t.o
$ lld-link t.o -out:t.exe -entry:DllMain -debug -dll


RUN: llvm-nm %p/Inputs/main-ret-zero-pe-i386.dll \
RUN:         | FileCheck %s -check-prefix PE-DLL

PE-DLL: 10001000 t .bss
PE-DLL: 10001000 t .data
PE-DLL: 10001000 t .text
PE-DLL: 10001000 T _DllMain
